Cutter-head.



A; B, LANDIS. GUTTER HEAD.y APPLICATION 'r1-LED JAN. 24A 1907.

Patented Feb. 20, 1912.

3 SHEETS-SHEET 1.

l @Willmann f B. LANDIS.

.GUTTER HEAD. APPLIOTIoN-HLED JAN. 24. 1907,

Patented Feb.'20,1912

3 SEBBTS-SHEET 2A A. B. LANDIS.

GUTTER HEAD. APPLICATION FILED JAILlz, 1907.1

L@ l 8, 3.98. Patented, Feb. 20, 1912.

3 SHEETS-SHEET 3,

I Y n M van For,

niv-irsi) sra'rss ABRAHAM B. LANDIS, or wAY'NEsBoRo, rENivsYLvAmA.

` narran-HEAD.

nordsee.

Specification of Letters Patent.

Patented Feb. 2o, rei:

Application filed January 24, 1907. Serial No. 353,852.

. screws,- etc., wherein the, die after being set as to size may be tixedfand made rigid as to position and is not aifected by the opening and closing operation, thereby insuring uniformity in the size of the product. This abject is accomplished by mounting and ar- -anging the cutterholders so that they will be adjusted, for opening and 4closing the die, tangentially with the work, or along lines that will; not intersect the axis of the die, in supporting blocks which are fixed on rigid heads to be adjusted to regulate the size of theJ die at an angle therewith, the operation of the two adjusting mechanisms being independent one of the other, all as will be presently more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereofhand on which similar reference characters indicate similar parts, Figure l is a front elevation of one of my improved cutter-heads, with the parts in operative position and showing the work in position for the die to operate upon. Fig. 2 a similar view of a part of the die showing the parts as' fixed to cut left-hand threads instead of right-hand threads, asv

shown in Fig. l. Fig. 3 a side elevation of one'of said cutter-heads. Fig. 4 a detail side elevationA of one of the blocks or supports for carrying the cutter-holders. Fig. a detail section through one of said blocks as seen when looking in the direction of one of the arrows from dotted line 5-5 in Fig. f-if, and including a section through the portion of the head A towhich it is attached, as seen when looking in the direction indicated b v the arrow from the dotted line 5 5 in Fig. G. Fig. 4a an underside plan view of one of the supports or blocks B. Fig. 5a, an end view of the same as. seen when looking in the direction indicatedfby the arrow from the dotted line -w 1n Fig. 4a. Fig. 6, a front elevation of theJ supporting head stripped' of all operative parts.- F ig. 7 a longitudinal section on dotted line 7 7 in 6. Figs. 8 to 13 inclusive, details illustrating views of different parts separately, and Figs. let and V15, views of modifications.

In said drawings the -portions marked A represent the main supporting head; B, the supports or blocks for supporting the cutterholders; C, the cutter-holders; and D, the cutters. v

The head A is of the form best shown inFigs. 6. and 7 and has a hollow shank A', to the rear end of which a plate A2 is secured by screws a (see Fig. Said plate A2 is for bolting the head tothe face plate on the machine spindle, in usual manner. At four points around the periphery of the head, equal distancesapart, are formed ears a, arranged in pairs, and between each pair is mounted a lever A3 on a pivot a2. The rear end 'of each lever is connected by a link A4 with a sliding collar A5, by means of pivots a3 and' a4 at the respective ends. Said c ollarA5 is mounted to slide' on the hollow shank A and is formed with a circumferential groove a5 in which a shifting fork (not shown) may engage and be op'- erated by suitable mechanism to shift said collar back andl forth. The face'of said head A is formed with a circular 'groove a6 near its periphery, and two axial grooves a? and as, which extend across said face at right angles Iwith each other and communicate with said circular groove.

The supports or blocks B are each of the form best shown in Figs. 4, 4ta, 5, and 5a, and are `bolted to the head A by bolts b, each -of which extends through a perforation in said head and the head of each of which engages in a slot in the face of its respective block, a clamping nut b9 being provided on its outer end. Said slots cut intopockets which contain springs which are interposed between said bolt heads and the outer ends of said pockets. Said slots are formed with enlarged portions b2 adaptedI to admit the heads'of the bolts, said enlarged portions being formed near the outer.

as in the face of the'` head. Each of saidilugs is formed with a notch orv transverse ,groove in its outer end adjacent the face of` the block. A cani ring B is mounted in the circular groot/'e a in the face of the head A, being of the particularzform best shown in ligs. 8 and 9, the overhanging .flange o* thereof being adapted to engage with the grooves in said lugs b3 and the inner face being formed with cam faces 10, 11., 12, and 13, which are adapted to bear upon the outer faces of said lugs. Said'overhanginglange b4v rests' in the grooves or notches in said lugs and completely covers the bearing joints between the cams and the lugs, and thus guards against any cuttings, dirt or becoming logged therein. The springs o rest at their inner ends upon the rigid bolt heads and their outer ends bear aga-inst the outer ends of the pookets'and thus force the blocks B outwardly so that their lugs 3 will bear iirrnly against the faces of the cams. l

Around a portion of the circumference 4of the ring B is formed a wormthread with which a screw o5 mounted in a tangential socket in head A, is adapted to engage. A detent he is mounted in a radial perforation -in head A and extends into the socket in lwhich screw o is mounted, its inner end en gagging with circumferential groove in said screw just under its head. Thus as said screw is turned, it is held from longitudinal movement, and operates through its engagement with the thread on the surface of the ring B to turn said ring and adjust the cams 1G, 11, 1Q, and 13, to force the blocks B toward the center of the head or to permit the springs h to force them away from the center. By this means, the size of the die can be regulated as desired. lllhen once regulated it may be made rigid, in so far as the position of the blocks B is con cerncd, by tightening the nuts b9 on the bolts o to clamp said blocks rigidly to the face ofthe head A.

The cutter-holders C are each mounted in an o )en right-an le wa on the lower inner.

side of each respective bloclr B, being held in position by a gib c formed with an angle edge adapted to engage with a groove in the back of. the holder, which groove is formed with inwardly inclined sides, so

that as said gib is forced inwardly it will` draw said holder into the corner of the angular way. Said gib is mounted in an adjacent groove in the block B, which groove is closed at both ends to keep out the dirt, and is secured in placeby screws c and c2, each of which is screw threaded at its inner end and engages with a screw threaded perforation in the block B under said gib. The head of each screw is cylindrical and fits in a perforation in the outer part of said block and is adapted to bearl against the outside face of said gib and secure it firmly in position. The outer end -of each holder C is rellenos gage. '.llius the sliding of thev collar A back and'forth on the hollow shank A will operate the 'levers and through the levers slide the holders C back and forth on the gibs c in their ways in the blocks B. By reason of the widened outer end ofthe holders C the grooves 03 are of suicient length, so that the adjustment .of the blocks B to regulate the size of the die will not interfere with the engagement of the lever A3.

'lhe cutters D are each mounted in right angle ways in the inner fac es cf the holders C in a similar manneras the holders are secured in the blocks B, having an angle groove in their backs which engages with the angle edge of the gibs d mounted in adjacent grooves in the holders C and secured 'by screws CZ and d2, which are adapted to.

force the cutters in toward the angle in the way and hold them in position. A screwt-hreaded seat is formed in the corner of said way which cuts through said corner and extends somewhat beyond its angle. A screw Z3 is mounted therein and its inner end is adapted to bear against the rear end of each cutter and hold it in position, and .by turning it said cutters may bey adjusted or fed up to the work as they wear away.

rlhe operation of the device is as follows: The cutter head being assembled as shown, and mounted upon the spindle -of the machine, in the manner well' understood, the die is first set for the size of work to be produced by adjusting the screws b5', which turns the ring B and the cams 10, 11, 12, and 13 carried thereby, so that the blocks B will be4 slid in the axial grooves 'a7 and as, either by being forced inward by cams, or

outward by the springs Z2 vaccording to which way the screw b5 is turned, as before described. After thesize is obtained as desired then the bolts b-may be tightened by turning up their ynuts o and thus making said blocks B rigid with the head A and guarding against 'any variation or vibration in the cutters. For rough work it-may not be Vnecessary'to thus rigidly Asecure the blocks,` but for hne workfitis of 'great advantage. The machine being 'ready for work the ring A5 is slid tothe position shown by Whole lines in F ig. '3 (by automatic mechanism, not shown) which slides the cutter holders C inwardly and' closes the die. proceeds until the length of threads is cut, when said' ring A5 is thrown back to position shown by dot-tedv lines in Fig. 3 and the cutterholder thus lslidoutward in a direction tangent to thework, or along lines which will not intersect the axis of the die', which opens the diev and permits the work The work to be withdrawn. The work is placed in tne work-holding jawsand the carriage fed back and forth in the usual manner, the die being opened and closed as desired in the manner just described. By this arrangement a die is provided for the purpose in which the opening and closing mechanism operates without in any way affecting the die in so far as its size isconcerned, which. after being adjustedy as desired, becomes fixed and thus insures that theproducl'. willA to adapt the head for cutting right-hand or left-hand threads as desired.

In Fig. 14 I have shown the cutter-holder .nounted on the block B by means of parallel links B8 pivoted to each other, as shown,

with a spaces between the adjacent edges of the two parts sufficient to allow a movement of the holder on'said linksy to open and close the die. Y In Fig. l5 I show a modified arrangement for opening and closing the die consisting of a cam formation A7 Von the ring A5 adapted to engage with aV roller A8 on the outer end of lever A3,..nd as said ring is slid back and forth, as in the other construction, itl 10 operates said lever and the holder in the same manner as before, except that the holdY ers would Abemoved to open the die by a spring as, as will be readily understood.. .Having thus fullydescribed my said invention, whatI claim as new and desire to Vsecure by Letters Patent is j .1. In a cutter head,fthe combination, of a die comprisingitangentially arranged cutters mounted to slide in supports, said supports mounted to slide on the main head, the movement of said cuttersand said sup'- ports being on lines at an angle to each other, and operatingmeans, substantially as set fort-h.A Y 2. A cutter head comprising a die-composed of cutters mounted to move on supports, said supports mounted to move on the head, the movement ofthe cutters being at an angle tothe movement of the supports 6. and tangential 'to the'worlnand. operating means, substantially as. ,set fortln 8. A screw-cutting die c omprismg a cutter mounted in a holder, said holder adapted to moveon a-line'with the-threadinggrooves' -6 5'off-said-ucutten a siqapvort;A to rece1velsa1d justing said support, and a Worm for 4operatingsaid cam,",substantially,as set forth.

holder mounted to be adjusted radlally,` whereby the size of the die may -be regu-v lated, and operating means, substantially as set forth.

4. A screw-cutting die comprising a body; a cutter support on said body, a cutter holder mounted in said support to move on a line substantially tangent to a circle the axis of which is the axis of the die, forv opening and closing the die, the support in which said holder operates being mounted to be adjusted radially by means of a cam, and said cam, substantially as set forth.

A'screW-cutting die comprising ra body, a sup-port mounted thereon,fmeans for adjusting said support-across the body, a cutter holder mounted on said support to move on a line substantially tangent to a circle the center. of which is the axis of thedie, for opening and closing the die, a lever for moving said holder, and means for operating said lever,; substantiallya's set forth.

6. A screw-cutting die comprising a body, supports mounted on said'body to be adjusted transversely across its face, a rotary ring having cam faces engaging with each support to fix and adjust them, means for'turning and securing said ring, cutter-holders mounted on said supports to be adjusted on lines tangential to a circle the center of which is the axisv of the-die, means for adjusting and securing said holders, cutters in said-holders, and means for adjusting -and securing said cutters, `substantially as set forth. y

7. A screwA cutting die comprising a body, a cutter vsecured to a holder, vsaid holder se cured to 'a support-,and 'adapteduto move on said support on -a linev substantially parallel to the thread-forming grooves of said cutter, said support, meansfor securngs'aid support to the body, and .-a..;.f 'c'am adjusting said support onlines radiaLtothe work for securing'various sizes of work, substantially as s et forth; v v y 8. A screw cutting die A'comprising av body,

a cutter securedI to a holder, said holder i vadapted to move on a line 'substantially parl' a-llel tothe thread-forming 'groovesof saidV cutter, a support on. whichsaid holder operates, means for securing said support to said body, said body'having a groove 'ada-pt-V Von a line-radial tothe work, .a cam for ad edge onfit-s back for securing itl to .a support,

said holder mounted on said support to ed to cont-rol. the movement ofsaid holder move on lines substantially parallel withl the y i thread-forming groovesaof said cutter, 'said ysaid sup Aholder moves to open and Vas set forth.

support mounted on said body, and a lever for operating-said hplder', substantially as set forth'.

10. A screw-cutting die comprising 'a cutter. a cutter holder, said holder mounted to move on a ine substantially parallel Iwith the thread-.fori'ninggrooves on said cutter' land seated: on a support against two sidesv 'of an angle having a beveled edgegroove -in-. the back thereof. ,said support and a move on a line substantially. parallel 1with. 'the thread-fdrming grooves of said cutter,

said holder formed with a; transverse groove in its rear end, a lever engaging said'groove for moving said holder, said transverse groove .being formed of a length lto adapt said cutter for radial adjustment for different lsizes of work without disengagement with said lever,"substantially as set forth.

' 12. A screw cutting die comprising a cutter, a cutter-holder, said,holder seated Ona support against two sides of an angle there-Y in, a beveled edge. groove being formed inthe back of said holder, said support, and a gib by .which said ho der is heldin contact .with both lsides of saidangle, substantially 13. A screw-cutting vdie comprising a cuttei', a cutter holder, a support on which said .said support is held againstlateral. moveter, a c tter holder,l

ment and a cam 4for controlling the position fof said support for various sizes of Work, l substantially as set .fort-h.y

14.. i- 'screw-cutting 'die comprising a cuta support on which said holder moveslto open'fJ--and close the Idie, a

head having grooves ,in its face by whichI port is' held against Ilateral movement, a cam` for controlli-ng the position' of said support forvarious sizes of work,- a` worm for operating' said cam.A and means for securing said support to said head, substantially as set forth. Y l

n15. A screw-cutting die comprising a cutyter holder with a. two-sided angle corner, a

cutter having a grooved face forforming screw threads and a' gr'oove with a` beveled clamping edge in its back, a clamp inserted in a slot in the cutter holder with a projecting edge engaging said groove and forming a bearing for the support of said cutter,

' into the inner screws passing through he 'outer wall of said slot through said clamtp and screwed vwall of said slot, said screws bearing against said clainp and forming the backward holding ther'eof ters'may be drawn backwardly and ',downclose the die,.a. hea-d having grooves in its face by `vvliich' so` that'4 said cutwardly to a -solid seating, substantially as set forth. i

1G. A screwy cutting die comprising a. cutter, a.I cutter holder, said cutter having c beveled-edge groove, a clamp inserted ind slot in said cutter holder, the edge of said clamp 'forming la bearing for th` supporttofI said cutter, screws 'passing through the outer wall of said slot. A through saidl lclamp and screwed into the inner. wall of' saiid slot, said `:screws formingithe backward holding for said clamp, whereby the angle on the edge of said groove serves to draiv the cutter backwardly and' downwardlvto a solid seating, 'substantially as set forth.

' 17.v A screw-cutting die comprising a rcutter, a-cutter holder, a support with a twosided angle-way upon which said holder moves, means tor securing said cutter to said' holder, Isaid holder having a groove with a beveled edge in its back', a gib with aprojecting angle ed'ge inserted in a .slot in said support,l said gib forming a support. for said holder, rewspassinfg through the outer wall of saidcslot, through 'said gili, and screwedv into the inner wallof said'slot, said screws forming the backward holding of said-gib, whereby the angle of said'edge and the groove in the back ofisaid holder serve i to secure said holderto the tivo surfaces of said way', substantially as set forth.

18; A screw cutting die comprising a diehead. a cutter, a cutter-holder, a support lfor said holder, said holder, arrangedtto lmove in a direction substantially paralleli with ,the lthread-torming face ofsaid cutter for the purpose of opening and closing the die, said lsupport secured to the iiace of the head. said head having means for holding said,support in a lateral position, and a cam for adjust, ing the position of said support forvarious sizes of work, substantially as set forth.

' 19. A screw-cutting die comprising a cam for adjusting thelcutter 'for cutting various s'izesof wbrk consisting of'a ring set into a recess in the face of a head` said ring having lits' cam cut in its rear side and its front overl'ianging against admission of dirt or ciittings. a cutter support` having a Itongue fitting Athe 'grooves in the head, and a projection from said' tongue toengage said cam, substantially as shown and described.

v2O. A screw-cutting `die comprising cutlters mounted on supports to move tangentially toa# circle the aXis of which is the axis of the die by one set of mechanism, and saidsup'ports mounted to be adgusted radially with the work by a separate set ofmechanisnh, substantially as set forth.

21. Ascrew-'cutting die comprising a fixed head,cutter supports mounted on said head, means'ffo adjusting said supports radially tWith thevvork, means for securing said sup- .'ports' rigid in adjusted position, the lcut-ters said cam to cover. the facey mounted on said supports, and meansfor moving said cutters on lines which Will not intersect the axis of the die,suhstantially as set forth.

22. AscreW-cutting die comprising ahead, cutter supports mounted-on said. head in radial grooves, means for adjusting said support in said grooves, means for securing said supports in adjusted position, cutter heads mounted in 4Ways on said supports which extend in lines tangentially to a cir-4 cle the axis of which is the axis of the die, means for moving said holders in said sup- 4 -ports to open and close the die, the cutters mounted in said holders and means for se- 15 curing said holders in position, substantially as set forth.

In Witness whereof, I have hereunto set my hand and seal at liVashington, D. C., this twenty-second day of January, A. D. 20 nineteen hundred and seven.

ABRAHAM B. LANDIs. [1.. 5.]

lVitnesses A. M. PARKNS, E. lV. BRADFORD. 

